Eleutherozoa

Eleutherozoa; Temporal range: Ordovician – Recent PreꞒ Ꞓ O S D C P T J K Pg N
	Fromia indica (Asteroidea) Ophiura ophiura (Ophiuroidea) Phyllacanthus imperialis (Echinoidea) Sollasina cthulu † (Ophiocistioidea †) Actinopyga echinites (Holothuroidea)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Echinodermata
Subphylum:	Eleutherozoa; Bell, 1891
Classes
	Subphylum Asterozoa Class †Somasteroidea; Class Asteroidea; Class †Stenuroidea; Class Ophiuroidea; ; Subphylum Echinozoa Class Echinoidea; Class †Ophiocistioidea; Class Holothuroidea; ;

Eleutherozoa is a subphylum of echinoderms. They are mobile animals with the mouth directed towards the substrate. They usually have a madreporite, tube feet, and moveable spines of some sort. It includes all living echinoderms except for crinoids. The monophyly of Eleutherozoa has been proven sufficiently well to be considered "uncontroversial."^[3]

^ Bell 1891
^ Cite error: The named reference nanglu2023 was invoked but never defined (see the help page).
^ Telford et al. 2014, p. 2

[1] Bell 1891

[nanglu2023-2] Cite error: The named reference nanglu2023 was invoked but never defined (see the help page).

[3] Telford et al. 2014, p. 2

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Eleutherozoa Temporal range: Ordovician – Recent PreꞒ Ꞓ O S D C P T J K Pg N
Fromia indica (Asteroidea) Ophiura ophiura (Ophiuroidea) Phyllacanthus imperialis (Echinoidea) Sollasina cthulu † (Ophiocistioidea †) Actinopyga echinites (Holothuroidea)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Echinodermata
Subphylum:	Eleutherozoa Bell, 1891^[1]
Classes^[2]
Subphylum Asterozoa Class †Somasteroidea Class Asteroidea Class †Stenuroidea Class Ophiuroidea Subphylum Echinozoa Class Echinoidea Class †Ophiocistioidea Class Holothuroidea